Dear All,
There was recently a discussion on haskell-cafe (
http://www.mail-archive.com/haskell-cafe@haskell.org/msg86472.html) about
licenses of libraries such as hmatrix and the combination of various
different licences.
One question was about per-package versus by-file licenses:
In Haskell the compilation unit is the module, and the per-file cabal header
allows for a license field. It seems then that a package should be the
least restrictive combination of all the licenses in all the contained
modules. If this has to become a hand-coded fancy function of various GPLx,
BSDy, OpenSource, and other licenses then so be it. That is the legal
reality. And use of a BSD3 module in hmatrix that does not depend upon
GPL'd GSL modules would be acceptable.
In short, I argue for a per-file(module) license regime.
Vivian
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